Bump hivemind from 1.0.1 to 1.1.2 in /requirements (#15839)

Bumps [hivemind](https://github.com/learning-at-home/hivemind) from 1.0.1 to 1.1.2.
- [Release notes](https://github.com/learning-at-home/hivemind/releases)
- [Commits](learning-at-home/hivemind@1.0.1...1.1.2)

---
updated-dependencies:
- dependency-name: hivemind
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements/pytorch/strategies.txt

@@ -6,4 +6,4 @@ fairscale>=0.4.5, <0.4.13
 deepspeed>=0.6.0, <=0.7.0
 # no need to install with [pytorch] as pytorch is already installed
 horovod>=0.21.2, !=0.24.0, <=0.26.1
-hivemind==1.0.1; sys_platform == 'linux'
+hivemind==1.1.2; sys_platform == 'linux'